21971120

素因数分解:

$2^4\times 5^1\times {\mathrm{193}}^1\times {\mathrm{1423}}^1$

素因数の和:1629

約数の個数: 40

約数和(自身を含む): 51383616

約数和(自身を除く): 29412496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 193, 386, 772, 965, 1423, 1544, 1930, 2846, 3088, 3860, 5692, 7115, 7720, 11384, 14230, 15440, 22768, 28460, 56920, 113840, 274639, 549278, 1098556, 1373195, 2197112, 2746390, 4394224, 5492780, 10985560, 21971120]

約数ペア:

[(1, 21971120), (2, 10985560), (4, 5492780), (5, 4394224), (8, 2746390), (10, 2197112), (16, 1373195), (20, 1098556), (40, 549278), (80, 274639), (193, 113840), (386, 56920), (772, 28460), (965, 22768), (1423, 15440), (1544, 14230), (1930, 11384), (2846, 7720), (3088, 7115), (3860, 5692)]